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| House of Riario
Italian: Casa Riario
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|---|---|
| Noble family | |
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| Country |  Italy |
| Founded | Ca. 1100 (Ca. 1100) |
| Founder | Degenardo Riario |
| Final ruler | Girolamo Riario |
| Titles | |
| Style(s) | "His/Her Excellency" |
| Dissolution | 1877; 147 years ago (1877) |
| Deposition | 1488 (1488) |
The House of Riario, sometimes referred to as Riario-Sforza, is an Italian noble family from Savona, near Genoa. Closely associated with the Papal States, the family gained control over several signorie ("lordships"), such as Bologna and Forlì.
The ascent of the Riario family resulted from the marriage of Paolo Riario to Bianca della Rovere, sister of Francesco della Rovere, the future Pope Sixtus IV. Through their allegiance to the House of Della Rovere, the Riarios produced two prominent cardinals, Pietro Riario (1445–1474) and Raffaele Riario (1461–1521).
In 1477 Paolo's son Girolamo (1443–1488) married Caterina Sforza (1463–1509), illegitimate daughter of Galeazzo Maria Sforza, the Duke of Milan. Girolamo was from 1473 LordofImola, and after his marriage with Caterina, also Lord of Forlì, replacing Pino III Ordelaffi, member of the powerful House of Ordelaffi.
In 1478, Girolamo supported the Pazzi conspiracy against the Medici family. When this failed, he attempted a territorial expansion against the Duchy of Ferrara which in 1482 became known as the "Salt War". The war caused the cession of Rovigo from FerraratoVenice, but the Papal States did not obtain any territory. The war resulted in an economic crisis, and Forlì was heavily taxed, whereby Girolamo became unpopular. Eventually he was murdered by the rival House of Orsi in 1488, and his wife Caterina became regent for his son Ottaviano Riario (1479–1523).
However, the death of Pope Sixtus IV in 1484 weakened the House of Riario. In 1499 Pope Alexander VI, member of the strong House of Borgia, created the title of "DukeofRomagna" (uniting the lordships of Forlì, Imola, Faenza, Cesena, Ravenna and Rimini) for his illegitimate son Cesare Borgia, and the Riario family removed first to Bologna, then also to Rome and Naples.
Other notable members of the house include:
